Add "verified" usernames.

[btimby]

There is a way to provide verified, unique usernames. This will require an external service to act as a trusted authority.

• User wants a unique, verified username.
• They utilize a website like nimtoknames.com.
• This web app maintains a database in orbitdb, the address of which is configured in nimtok.
• The organization signs the name and user's public key with their own key, which is also configured in nimtok.
• Whenever a user registers, the name can be checked against the db.
• Whenever the user is displayed, and symbol can signify that the signature check passed.

This would be an additional possibly paid-for service. Kinda like a Certificate Authority.